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Precision Cutting Turning Insert for High-Speed Metal Machining

Model: CNMG120408

Insert Shape：C, Rhombic 80°, 80-degree diamond-shaped insert

Clearance Angle: N, 0°Clearance Angle (Negative Insert)

Tolerance Class: M, Medium Tolerance

Chip Breaker and Hole: G, Double-sided insert with center hole & chipbreaker

Cutting Edge Length: 12, 12.70 mm, Inscribed Circle (I.C.) diameter is 12.70 mm

Insert Thickness: 04, 4.76 mm, Thickness (S) is 4.76 mm

Nose Radius: 08, 0.8 mm, Corner radius (r) is 0.8 mm

 

Keywords：

Carbide Insert, Cemented carbide tool, CBN cutter, PCD cutter, Carbide end mill, Indexable insert, Carbide turning tool, Carbide milling cutter, Carbide boring tool, Metal cutting tool, CNC machine tool, Machining center tool, Turning Insert, Milling Insert, Drilling Insert, Carbide Milling Cutter, Carbide Drill Bit, Carbide Tap, Reamer, Chamfer Mill

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Description

Product Information:

CNMG120408 Turning Insert is a high-performance carbide insert designed for external turning and facing operations. Featuring a double-sided 80° diamond shape, it offers excellent strength, stability, and cost efficiency. The precision-ground cutting edge ensures smooth chip control, reduced cutting forces, and extended tool life. Suitable for machining steel, stainless steel, cast iron, and alloy materials, the inserts is widely used in CNC lathes for roughing and semi-finishing applications.

 

Product Details:

Double-Sided Design for Cost Efficiency: Featuring 8 usable cutting edges, the insert significantly reduces tooling costs while maximizing tool life, making it an economical choice for high-volume production.

Superior Wear Resistance: Manufactured from premium-grade carbide and advanced coating technology, the insert offers excellent resistance to wear, heat, and oxidation, ensuring long-lasting performance even under high cutting speeds.

Excellent Surface Finish: The optimized chipbreaker geometry enables smooth chip evacuation, reduces cutting forces, and delivers a stable machining process with superior surface finish.

Wide Material Compatibility: Suitable for machining carbon steel, alloy steel, stainless steel, cast iron, and certain hardened materials, the CNMG120408 insert provides versatility for diverse industrial applications.

Stable and Reliable Machining: The negative rake angle and robust insert structure enhance edge strength, reducing vibration and tool breakage during heavy or interrupted cuts.

High Precision and Consistency: Strict dimensional tolerance control ensures repeatable accuracy, making the insert ideal for CNC lathes and automated production lines.

 

Main technical parameters:  

Type LE IC S D1
CN_1204_ 12.9 12.7 4.76 5.16
CN_1606_ 16.1 15.875 6.35 6.35
CN_1906_ 19.3 19.05 6.35 7.94

 

Application Chip Breaker Groove Type RE ap (mm) fn (mm/r)
Finishing AF CNMG120404 0.4 0.10-1.50 0.04-0.20
CNMG120408 0.8 0.20-2.00 0.08-0.25
CNMG120412 1.2 0.50-2.50 0.10-0.25

 

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